Cardone 3R-504 Power Steering Reservoir

Power Steering Reservoir for BMW Applications

Restore proper power steering fluid storage and flow with this Cardone Power Steering Reservoir, part number 3R-504. It is built for remote-mounted systems and is designed for BMW vehicles that use an external reservoir, including Active Steering applications.

Key Features

• Cardone Power Steering Reservoir, part number 3R-504
• Fits remote-mounted power steering systems
• Includes reservoir cap
• Black plastic construction
• O.E.-style fit, function, and performance
• 100% tested for leak-free operation
• Made from O.E.-grade material for strength and durability
• Resists cracking from engine compartment heat
• Reservoirs with integrated filter maintain O.E. filtration efficiency

Product Details

This Cardone reservoir is a direct replacement for the original remote power steering reservoir used on select BMW models. The 3R-504 follows the original equipment design and is 100% tested to help ensure proper fit and function. It is intended for vehicles where the reservoir is mounted away from the pump, such as on the firewall, inner fender, or near the pump assembly. This part cross-references BMW 32416782538 for the same application.

Compatible With BMW X5, 2008-2013; BMW 528i, 2008-2010 with Active Steering; BMW 528i xDrive, 2009-2010 with Active Steering; BMW 535i, 2008-2010; BMW 535i GT, 2010; BMW 535i xDrive, 2009-2010; BMW 550i, 2006-2010 with Active Steering; BMW 650i, 2006-2010 with Active Steering; BMW 535xi, 2008; BMW 750i, 2006-2008; BMW 750Li, 2006-2008; BMW 760Li, 2003-2008; BMW 525i, 2004-2007 with Active Steering; BMW 530i, 2004-2007 with Active Steering; BMW 760i, 2004-2006; BMW 545i, 2004-2005 with Active Steering; BMW 745i, 2002-2005; and BMW 745Li, 2002-2005.

Common Issues This Part Can Address

• Cracked reservoir housing from heat and vibration
• Fluid leaks at the reservoir body or hose connections
• Foaming power steering fluid caused by trapped air or restricted flow
• Noise or cavitation linked to a clogged remote reservoir
• Poor steering assist caused by contaminated or restricted fluid circulation

Installation Notes and Tips

Inspect the return and outlet hoses before installation, since hose deterioration can contribute to debris, leaks, and fluid contamination. Bleed air from the power steering system after installation to prevent foaming and noise. Depending on the vehicle, the reservoir may be mounted on the firewall, inner fender, or near the pump, so verify the original location before service. For BMW X5 and other Active Steering applications, confirm the reservoir style against the original part number before replacement.

Quality Assurance

Cardone manufactures this reservoir to O.E. design standards and tests each unit for proper fit and function. The use of O.E.-grade material and leak testing supports consistent performance in demanding engine compartment conditions.